यदि समान्तर श्रेणी में \(a_4=20\) और \(a_9+a_{14}=160\) है तो \(a_{28}\) क्या होगा?
If in an AP \(a_4=20\) and \(a_9+a_{14}=160\), what is \(a_{28}\)?
Explanation opens after your attempt
B. (176)
Concept
(a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160), so (d=8). \(a_{28}=20+24d=212\).
Why this answer is correct
The correct answer is B. (176). (a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160), so (d=8). \(a_{28}=20+24d=212\).
Exam Tip
(a_9+a_{14}=\(a_4+5d\)+\(a_4+10d\)=40+15d=160) इसलिए (d=8)। \(a_{28}=20+24d=212\)।
Login to save your score, XP, coins and progress.
AI Video Prompt 16:9 + 9:16
Is question ka premium MCQ video banane ke liye ready prompt. Copy karke Sora, Runway, Canva AI, CapCut AI, ChatGPT video workflow ya editor me use karein.
